四川省湿地生态系统服务功能价值评估

依据<中国湿地百科全书>及四川省林业厅调查数据,将四川省湿地类型划分为河流湿地、湖泊湿地、沼泽和沼泽化草地、水田湿地、池塘湿地、水库湿地两大类6种类型,采用定量货币化方法对四川省湿地生态系统服务功能价值进行了估算,为四川省湿地保护与规划提供生态经济理论依据.结果表明,四川省湿地生态服务功能的总价值达7 483.03亿元人民币,相当于四川省2009年GDP的52.88%,各项湿地生态功能价值中最高的是固碳释氧功能价值达3 422.00亿元人民币,约占45.73﹪,其次是水分调节功能和物质生产功能,说明湿地对四川省的生态环境和国民经济有重要作用,并和人们的生产、生活、娱乐密切相关.     

基于神经网络方法的湿地生态脆弱性评价

应用BP神经网络模型对扎龙湿地的生态脆弱性进行了评价.采用7-2-4-1结构,以计算得到的各湿地类型样本栅格单元生态脆弱指数EⅥ值作为训练集,通过最大1 000次的误差反向传播训练,获得的最大误差是1.1%,最小误差0,成功实现了扎龙湿地7维评价指标变量到1维变量即扎龙湿地生态脆弱性指数的映射,得到了研究区全部栅格单元的生态脆弱性指数值.运用GIS技术,制得扎龙湿地生态脆弱性分级图,分析得出扎龙湿地中度脆弱和重度脆弱的地区占整体的18%,潜在脆弱地区和微度脆弱地区占整体的63%,从量化角度表明扎龙自然保护区整体生态环境不容乐观,为扎龙湿地生态环境保护和治理提供了具有科学意义的借鉴.     

重钢非钢产业发展情况

重钢在做强钢铁主业的同时,大力发展非钢产业,目前非钢产业主要业务分为矿产资源、建筑与房地产、气体制造、物流运输、冶金废弃物综合利用五大板块.近年来,非钢子公司在充分发挥好对钢铁主业和工程建设的支撑、服务作用的同时,大力拓展外部市场,非钢销售收入比重逐年上升.2012年重钢实现销售收入259.16亿元,其中非钢产业实现销售收入97.28亿元(汇总),占重钢销售收入(汇总)290.3亿元的33.51％,非钢产业实现利润40993万元.     

Combustion Ratio of Waste Tire Particle, PC and Mixture at Blast Temperature of BF

 In order to study the combustion characteristics of waste tire particle (WTP), pulverized coal (PC) and their mixture, the contents of CO, CO2 and O2 of off-gas during the combustion of WTP, PC and mixture under the condition of rich oxygen by 0-4% in blast and at 1250 ℃ were measured simultaneously using synthetically infrared analyzer, and then the corresponding combustion ratio was calculated and compared. The results showed that the burning rate of WTP reached approximately 57%, which is much higher than that of PC (only about 18%) in the initial 650 s in fresh air, and then the increase of combustion rate of PC is faster than that of WTP; the combustion rate of PC improved remarkably with the addition of WTP. Meanwhile, the combustion rates of all these materials improved with the increase of oxygen content.     

1990年上半年冶金系统备件库存量金额上升

根据冶金系统149个单位统计,1990年上半年备件库存量为25.48亿元,比1989年末增加1.93亿,增长率为8.2％。其中:工矿备件库存量为19.36亿元,增加1.4164亿元;汽车备件库存量为2.45亿元,增加0.1503亿元;机车车辆备件库存量为0.68亿元,增加0.1486亿元。库存量增加超过1000万元的有鞍钢、首钢、包钢和宝钢。 1990年上半年备件库存资金上升的主要原因: 1.为大、中修及技术改造项目准备的备件集中到货。一般大修项目安排在下半年进行的稍多一些,这是影响上半年库存资金增长的重要因素。 2.备件价格上涨,1990年上半年到货121517吨,金额为103241.39万元,平均每吨备件为8496     

中国高原湿地退化与恢复研究进展

高原湿地是我国重要湿地类型之一,生态环境功能独特,极具研究价值.总结了中国高原湿地退化与退化湿地恢复研究进展,并提出了高原湿地退化研究主要优先领域及退化湿地恢复与保护时策.     

锡林河湿地土壤呼吸日变化及温度响应特征研究

[目的]了解土壤呼吸的特征和影响土壤呼吸的因素有助于理清碳循环过程,进而对生态系统响应全球变化结果做出预测.[方法]监测了内蒙古锡林河湿地3个群落生长季和非生长季土壤呼吸速率的日动态变化,同时对大气和土壤的温度变化进行测量.[结果]锡林河湿地群落土壤呼吸强度与温度呈指数变化.土壤呼吸强度与温度具有极高的相关性(R<'2>=0.92),但在不同的温度范围内其相关性存在差异.锡林河湿地群落土壤呼吸日变化呈单峰曲线.生长季和非生长季土壤呼吸的强度存在巨大差异.生长季呼吸强度是非生长季呼吸强度的5～10倍.[结论]该研究证明湿地群落非生长季土壤呼吸的存在,并且其特征与生长季存在相似.     

紫金矿业探获资源潜在价值千亿元

2012年,紫金矿业集团公司投入地勘资金4.5亿元,创造矿权价值近50亿元,新探明资源潜在价值达1 002亿元,发现了一批国家紧缺的大宗金属矿产。2012年,紫金矿业按照党中央、国务院"实施找     

TA2/16MnR复合材料在加料预热器球形管箱上的应用

济南化纤总公司80年代从意大利FBM-HUDSON/公司引进了一套价值人民币13亿元的绦纶生产线,投入生产后,年产量达20万吨,产值7亿元.加料预热器是生产线上的重要设备之一,球型管箱是该设备的主要部件.     

邯钢强力推进辅业改制

随着企业的不断发展壮大,邯钢非钢产业也得到了空前的发展.非钢产业主要涉及化肥、化工、汽车运输、生活后勤、宾馆服务、矿业、医院、电讯等不同产业.截至2004年9月,非钢产业共有职工4426人,占邯钢全部职工的18%.预计全年营业收入4.48亿元,约占公司营业收入的2%.     

转炉炉壳热应力分析

根据实际转炉建立实体模型。以有限元为手段,考虑了炉衬和炉壳材料的物性参数随温度变化的特点和炉衬与炉壳之间膨胀间隙,计算了转炉炉壳在温度载荷和炉衬膨胀压力同时作用下的热应力。所得结果可为转炉炉壳设计提供依据。     

焦炭热性能指标意义浅析

通过对焦炭在高炉内的历程及其变化规律的剖析,阐述焦炭热性能指标的意义,形象地把焦炭在高炉内的损耗分为三部分(M1,M2,M3)。指出M2对焦比及焦炭价格有一定的指导作用。     

Results of treatment of cancer of the cardia

Cancer of the cardia is traditionally discussed with cardiac cancer of the lower portion of the esophagus and upper gastric cancer invading the esophagus, and the specific characteristics of cancer of the cardia have never been clearly defined. We reviewed the outcome of 172 patients with adenocarcinoma of the cardia who had undergone radical surgery between 1949 and 1994 in the Division of Gastrointestinal Surgery of the Cancer Institute Hospital. The centers of the tumors were located within 2 cm above and below the boundary between the esophagus and the stomach, and their longitudinal diameter was less than 8 cm. We divided the patients into an early period (1949-1979; n = 79) and a late period (1980-1994; n = 93), and focused on the historical transition. There were no differences in patient gender or histology between the two periods. However, the late period was associated with fewer cases of esophageal invasion and shorter longitudinal diameter, as the age of the population advanced. The number of advanced cancers such as the localized and infiltrative type had decreased, and early cancer and early clinical stage had become more common, but despite the fact that the number of early cancers had increased, extended dissection, such as thoracic and paraaortic lymph node dissection, was performed more frequently. By clinical stage, the long-term outcome markedly improved in Stage I patient in the late period, and tended to improve in Stage II and III patients. This appears to have been attributable to the prevention of micrometastasis by extended dissection, although the number of early cancers is another major potential cause. There were no differences in the outcome of Stage IV patients between the two periods, and further advances in multimodality therapy must be awaited. The range of resection is basically proximal gastrectomy, and if there are adequate indications, the prognosis is favorable. In view of the status of lymphatic flow and lymph node metastasis, and long-term results, lateroaortic lymph node dissection is important. Since the number of early cancer patients has been increasing, if intraabdominal recurrence is prevented, intrathoracic lymph node dissection will contribute greatly to the outcome of such patients.     

The effect of amount of possession of the trait of hostility on accuracy of perception of hostility in others.

Some theories of personality hold that an individual's perception of others is influenced by his own personality characteristics; more specifically, that a trait of low social value will be projected more into others, and that insight into the possession of these characteristics reduces this distortion. These 2 hypotheses were tested by having a group of college students rate each other (including themselves) on degree of friendliness or hostility. Agreement with group rating about self yielded the insight score. In general, the hypotheses were supported; the "friendly" Ss were most accurate in their perception of others, and insight was positively associated with accurate perception. From Psyc Abstracts 36:04:4HL16M. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Comparison of rates of infection of two methods of emergency ventricular drainage

The rates of infection of two methods of external ventricular drainage in use at Atkinson Morley's Hospital--namely, (a) percutaneous drainage with Rickham reservoirs and (b) tunnelled ventriculostomies--were compared in this retrospective review. Percutaneous drainage of CSF with Rickham reservoirs was associated with a 27% rate of infection as identified by positive microbiological cultures; tunnelled ventriculostomy catheters had a 10% infection rate. The difference in the infection rate between the two methods was statistically significant (P < 0.015). Other variables examined, including the age and sex of the patients and the reasons for ventricular drainage, were not associated with an increased rate of infection. Most infections from either method were caused by a coagulase negative staphylococcus. The average duration of ventricular drainage before identification of positive cultures was 5.7 days for Rickham reservoirs and 6.0 days for ventriculostomies.     

浅析《野草》的版画特征

鲁迅先生一生热爱美术作品,对版画中木刻兴趣尤甚.<野草>作为其"写心之作",亦呈现出一些与木刻版画一致的审美特征:一是具有木刻版画的色彩特征,多对比、多冷色,有阴郁的美感;二是具有木刻版画的力度特征,环境描写、人物刻画处处刀锋毕现,遒劲有力,有一种"力之美".     

四辊破碎机车刀架的改造

针对四辊破碎机车刀架车削中存在的几个问题,详细介绍了电动车刀架的结构和工作原理,建立主要设计参数的数学表达式,并进行适当的分析。改造后,这种电动车刀架运行平稳、可靠、方便、省力,取得了预期的效果。     

Effect of antibiotics of chemotaxis of human leukocytes

The effect of 20 different antibiotics on chemotaxis by human neutrophils was studied. Human leukocytes incubated with chloramphenicol, rifampin, sodium fusidate, and tetracyclines in vitro showed markedly depressed migration. The mechanisms by which these antibiotics affect leukotaxis are discussed.